How many electrons are in an atom of O2-.
I have a problem picturing and atom of O-2. I can picture an ion but not an atom.
yes ion.
There are 8 electrons in an O atom so there must 16 electrons in two O atoms. It has a -2 charge; therefore, it must have two more electrons in excess.
To determine the number of electrons in an atom of O2-, we need to consider the atomic number and the charge on the ion.
1. Find the atomic number of oxygen (O) on the periodic table. The atomic number of oxygen is 8.
2. Since O2- is negatively charged, it means that the ion has gained two extra electrons compared to a neutral oxygen atom.
3. Subtract the charge of the ion (-2) from the atomic number (8).
8 - 2 = 6
Therefore, an atom of O2- has 6 electrons.